Finally I finished with the first 1000 KM, er, 600 miles (you people need to start using the metric system )

Now I noticed a couple of things:
The first thing which is most noticeable is that there are a lot more vibrations even in RPM that previously there were none (relatively).

The second thing is that there's bloody oil everywhere!
the tube that comes out of the air box had a small amount of oil in it after a short ride and I found oil dripping on the bike, mostly on the right side (and it's visible on the radiator as well).
My guess is that either the mechanic didn't close the oil dip-stick all the way, or that he filled too much oil.

In the mean while I emptied the tube from the air box, tightened the dip-stick and wiped off the bike. hopefully that will fix it or I'll have to head back to the dealer.